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A kind of zinc oxide microsphere and preparation method thereof

A zinc oxide, microsphere technology, applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, nanotechnology for materials and surface science, etc., to achieve strong morphology controllability, low reaction temperature, and regular morphology. Effect

Inactive Publication Date: 2015-11-11
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of preparing three-dimensional ZnO materials still needs to be developed, and the preparation of three-dimensional ZnO by simple, reproducible, and low-cost synthesis methods is still very challenging.

Method used

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  • A kind of zinc oxide microsphere and preparation method thereof
  • A kind of zinc oxide microsphere and preparation method thereof
  • A kind of zinc oxide microsphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1.1 Add 0.0025mol zinc nitrate in 50mL deionized water, and stir for 20min at room temperature.

[0033] 1.2 To the solution described in 1.1, add 0.0075 mol of hexamethylenetetramine (HMT), and stir at room temperature for 20 minutes to obtain a homogeneous solution.

[0034] 1.3 Then add 0.0005 mol of the surfactant tartaric acid to the solution described in 1.2, and stir at room temperature for 20 minutes to obtain a homogeneous solution.

[0035] 1.4 Transfer the solution described in 1.3 to a 100mL reactor, heat it to 150°C in an oven, and react for 6 hours. The samples cooled in the furnace are subjected to centrifugal washing to prepare yarn-like ball-like zinc oxide microspheres (such as figure 2 Shown). The obtained yarn-like ball-like zinc oxide microspheres have the structural characteristics of uniform size and a diameter of about 4.5-6.5 μm.

[0036] figure 1 It is the X-ray diffraction pattern of the sample. It can be seen from the figure that the crystal form o...

Embodiment 2

[0040] The preparation method is the same as in Example 1, except that the amount of hexamethylenetetramine is increased to 0.0125 mol. The obtained hairline ball-like zinc oxide microspheres are similar to those in Example 1, and have a diameter of 5-7.5 μm.

[0041] Figure 4 It is a low-magnification scanning electron microscope photo of the sample. It can be seen from the figure that the sample is composed of zinc oxide nano flakes, which are wool-like balls. Some of the microspheres have a large hole in the center. The sample has many damages and has a uniform size distribution. The diameter is 5-7.5μm. It can be seen from the high magnification scanning electron micrograph that there are still some small holes on the surface of the microspheres. After BET test, the specific surface area of ​​the obtained microspheres is 22.97m 2 / g.

Embodiment 3

[0043] The preparation method is the same as in Example 1, except that the dosage of hexamethylenetetramine is reduced to 0.005mol. The obtained hairline ball-like zinc oxide microspheres have a diameter of 4.8-5.5 μm.

[0044] Figure 5 It is a scanning electron microscope photo of the sample. It can be seen from the figure that the sample is composed of zinc oxide nano flakes, which are hair-like balls, uniform in size, diameter range 4.8-5.5μm, good crystallization, regular morphology, most of the microspheres There is no large hole in the center. After BET test, the specific surface area of ​​the obtained microsphere is 21.47m 2 / g.

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Abstract

The invention discloses yarn ball-like zinc oxide microspheres and a preparation method thereof. The grain size of the microspheres is 2-9mu m, the microspheres consist of zinc oxide thin sheets, and a part of the microspheres have a large hole in the center. The preparation method comprises the following steps: dissolving zinc salt in water to prepare a solution, then, adding hexamethylenetetramine, stirring at room temperature till the solution is clarified, and then adding tartaric acid and uniformly stirring to obtain a reaction solution; and transferring the solution to a reaction kettle, reacting at 120-180 DEG C to prepare zinc oxide; after reaction, carrying out centrifugal separation and washing to obtain the zinc oxide microspheres. The preparation method of the zinc oxide microspheres disclosed by the invention has the advantages that the needed materials are cheap, the preparation process is simple and convenient to operate, the reaction temperature is low and the reaction time is short. The prepared product is regular in shape, has large specific surface area, strong morphologic controllability, good stability and repeatability and strong operability and practicality and has a potential application value and strong practicality in the field of photocatalytic performance, gas sensitivity and the like.

Description

technical field [0001] The invention relates to a zinc oxide microsphere and a preparation method thereof, in particular to a zinc oxide microsphere with a special wool-like shape synthesized by a hydrothermal method, and belongs to the technical field of zinc oxide materials. Background technique [0002] Zinc oxide is a semiconductor material with a wide band gap (3.37eV) and high exciton binding energy (60eV). It has unique electrical, optoelectronic, and magnetic properties, and has great potential in optoelectronic materials and devices. A wide range of applications, and these applications mainly rely on the morphology of ZnO. Therefore, in recent years, the preparation and properties of ZnO with different morphologies have attracted much attention. There are many methods for ZnO morphology control, such as surfactant covering method, soft and hard template method, self-assembly method, spin nanoribbon or nanosheet method. At present, one-dimensional ZnO nanostructure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/02B82Y30/00B82Y40/00
Inventor 师瑞霞杨萍宋雪玲董晓斌贾长超
Owner UNIV OF JINAN
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